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5451WTD: Morrow Wunderbuss Thinker Toys Motherboard Schematic/docs

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  • B. Degnan
    May 7, 2007
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      Herb/Anyone else..

      I have a 1977 Morrow Wunderbuss "Thinker Toys" S-100 Motherboard with a
      blown Zener diode near a 12+V position at the back of the board. Anyone
      have a schematic? I checked Herb Johnson's site, there is nothing for this
      board listed. I would like to determine the exact type of diode so I can
      replace it.

      What would cause a Zener diode to pop?

      Thanks.
      Bill
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